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Weather Longmont: Current forecast

Longmont / Colorado (CO) / United States

32.3 °C
Feels like 26.8 °C
Min 10 °C / Max 33 °C
Weather Longmont: Sunny, 32 °C Sunny
13.7 km/h SE
Wind
28.1 km/h SE
Gusts
1008 hPa
Pressure
0 mm
Precipitation
7 %
Humidity
5.5
UV index

Pollen (today)

Hazel None
Alder None
Birch None
Oak None
Grass None
Mugwort High
Ragweed High
06:36 / 19:18
Sunrise / Sunset
05:45 / 18:57
Moonrise / Moonset
New Moon (0 %)
Moon phase

Updated: Sep 10, 2026, 23:35 CEST Sep 10, 2026, 15:35 MDT

Today's Summary

Right now Longmont has sunny weather. The thermometer currently shows 32.3°C. With wind from the south-east, it feels noticeably colder, around 26.8°C. UV levels are elevated today – remember sun protection if you're outdoors. During the day temperatures will range between 10.4°C and 32.5°C.

Hourly forecast – Longmont, today

Sep 10, 16:00
31 °C
Sunny
Longmont Sep 10, 16:00: Sunny, 31 °C
Sep 10, 17:00
25 °C
Sunny
Longmont Sep 10, 17:00: Sunny, 25 °C
Sep 10, 18:00
20 °C
Overcast
Longmont Sep 10, 18:00: Overcast, 20 °C
Sep 10, 19:00
20 °C
Overcast
Longmont Sep 10, 19:00: Overcast, 20 °C
Sep 10, 20:00
17 °C
Overcast
Longmont Sep 10, 20:00: Overcast, 17 °C
Sep 10, 21:00
17 °C
Overcast
Longmont Sep 10, 21:00: Overcast, 17 °C
Sep 10, 22:00
18 °C
Cloudy
Longmont Sep 10, 22:00: Cloudy, 18 °C
Sep 10, 23:00
16 °C
Cloudy
Longmont Sep 10, 23:00: Cloudy, 16 °C
Sep 11, 00:00
14 °C
Cloudy
Longmont Sep 11, 00:00: Cloudy, 14 °C
Sep 11, 01:00
13 °C
Cloudy
Longmont Sep 11, 01:00: Cloudy, 13 °C
Sep 11, 02:00
13 °C
Clear
Longmont Sep 11, 02:00: Clear, 13 °C
Sep 11, 03:00
12 °C
Clear
Longmont Sep 11, 03:00: Clear, 12 °C
Sep 11, 04:00
12 °C
Clear
Longmont Sep 11, 04:00: Clear, 12 °C
Sep 11, 05:00
13 °C
Sunny
Longmont Sep 11, 05:00: Sunny, 13 °C
Sep 11, 06:00
20 °C
Partly cloudy
Longmont Sep 11, 06:00: Partly cloudy, 20 °C
Sep 11, 07:00
23 °C
Overcast
Longmont Sep 11, 07:00: Overcast, 23 °C
Sep 11, 08:00
26 °C
Overcast
Longmont Sep 11, 08:00: Overcast, 26 °C
Sep 11, 09:00
28 °C
Overcast
Longmont Sep 11, 09:00: Overcast, 28 °C
Sep 11, 10:00
30 °C
Overcast
Longmont Sep 11, 10:00: Overcast, 30 °C
Sep 11, 11:00
32 °C
Sunny
Longmont Sep 11, 11:00: Sunny, 32 °C
Sep 11, 12:00
34 °C
Overcast
Longmont Sep 11, 12:00: Overcast, 34 °C
Sep 11, 13:00
33 °C
Overcast
Longmont Sep 11, 13:00: Overcast, 33 °C
Sep 11, 14:00
33 °C
Overcast
Longmont Sep 11, 14:00: Overcast, 33 °C
Sep 11, 15:00
32 °C
Patchy rain possible
Longmont Sep 11, 15:00: Patchy rain possible, 32 °C
Time
16
17
18
19
20
21
22
23
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
Longmont Sep 10, 16:00: Sunny
Longmont Sep 10, 17:00: Sunny
Longmont Sep 10, 18:00: Overcast
Longmont Sep 10, 19:00: Overcast
Longmont Sep 10, 20:00: Overcast
Longmont Sep 10, 21:00: Overcast
Longmont Sep 10, 22:00: Cloudy
Longmont Sep 10, 23:00: Cloudy
Longmont Sep 11, 00:00: Cloudy
Longmont Sep 11, 01:00: Cloudy
Longmont Sep 11, 02:00: Clear
Longmont Sep 11, 03:00: Clear
Longmont Sep 11, 04:00: Clear
Longmont Sep 11, 05:00: Sunny
Longmont Sep 11, 06:00: Partly cloudy
Longmont Sep 11, 07:00: Overcast
Longmont Sep 11, 08:00: Overcast
Longmont Sep 11, 09:00: Overcast
Longmont Sep 11, 10:00: Overcast
Longmont Sep 11, 11:00: Sunny
Longmont Sep 11, 12:00: Overcast
Longmont Sep 11, 13:00: Overcast
Longmont Sep 11, 14:00: Overcast
Longmont Sep 11, 15:00: Patchy rain possible
Temperature (°C)
Chance of rain (%)
0
0
9
10
16
15
6
4
6
7
1
1
1
1
2
8
9
9
9
1
9
9
9
9
Precipitation
0 mm
Wind (km/h)
ESE
18
E
16
SE
13
S
10
SSW
3
WSW
2
NW
8
WNW
9
WNW
7
WNW
3
W
3
WNW
3
SW
1
SSE
1
E
1
SSW
3
S
4
SE
5
E
8
E
10
E
8
NW
5
W
28
SSE
18
Pressure (hPa)
1007
1008
1009
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1011
1011
1010
1009
1008
1007
1005
1004
1003
1003
1003
Humidity (%)
8 %
15 %
39 %
49 %
64 %
63 %
34 %
19 %
19 %
20 %
20 %
20 %
20 %
21 %
12 %
10 %
10 %
9 %
8 %
8 %
8 %
10 %
12 %
12 %
Cloud cover (%)
0 %
5 %
97 %
91 %
100 %
100 %
72 %
63 %
75 %
84 %
6 %
5 %
6 %
13 %
37 %
93 %
100 %
100 %
100 %
7 %
100 %
100 %
100 %
100 %

14-day weather forecast – Longmont

14-day trend for Longmont: Temperatures stay fairly stable over the period with no big swings. Lows can drop to around 9.3°C at night, with daytime highs up to 34.9°C.

Date
Sep 10
Sep 11
Sep 12
Sep 13
Sep 14
Sep 15
Sep 16
Sep 17
Sep 18
Sep 19
Sep 20
Sep 21
Sep 22
Sep 23
Longmont September 10, 2026: Sunny
Longmont September 11, 2026: Sunny
Longmont September 12, 2026: Patchy rain possible
Longmont September 13, 2026: Sunny
Longmont September 14, 2026: Sunny
Longmont September 15, 2026: Patchy rain possible
Longmont September 16, 2026: Patchy rain possible
Longmont September 17, 2026: Sunny
Longmont September 18, 2026: Sunny
Longmont September 19, 2026: Sunny
Longmont September 20, 2026: Overcast
Longmont September 21, 2026: Sunny
Longmont September 22, 2026: Sunny
Longmont September 23, 2026: Sunny
Temperature (°C)
Chance of rain (%)
1
36
57
17
57
86
72
17
4
1
57
2
1
1
Precipitation
1 mm
1.3 mm
0.3 mm
4.2 mm
11.1 mm
3.5 mm
0.1 mm
1.8 mm
Wind max (km/h)
18
28
24
24
26
17
12
16
18
19
11
21
19
16
Date Weather Min °C Max °C Sunrise Sunset Moonrise Moonset Moon phase
September 10, 2026 Longmont September 10, 2026: Sunny Sunny 10 °C 33 °C 06:36 19:18 05:45 18:57 New Moon (0 %)
September 11, 2026 Longmont September 11, 2026: Sunny Sunny 12 °C 34 °C 06:37 19:16 07:02 19:22 New Moon (0 %)
September 12, 2026 Longmont September 12, 2026: Patchy rain possible Patchy rain possible 12 °C 28 °C 06:38 19:14 08:17 19:47 New Moon (3 %)
September 13, 2026 Longmont September 13, 2026: Sunny Sunny 12 °C 35 °C 06:39 19:13 09:31 20:14 Waxing Crescent (8 %)
September 14, 2026 Longmont September 14, 2026: Sunny Sunny 9 °C 30 °C 06:40 19:11 10:44 20:44 Waxing Crescent (14 %)
September 15, 2026 Longmont September 15, 2026: Patchy rain possible Patchy rain possible 13 °C 23 °C 06:41 19:09 11:55 21:19 Waxing Crescent (23 %)
September 16, 2026 Longmont September 16, 2026: Patchy rain possible Patchy rain possible 12 °C 20 °C 06:42 19:08 13:03 22:01 First Quarter (32 %)
September 17, 2026 Longmont September 17, 2026: Sunny Sunny 11 °C 27 °C 06:43 19:06 14:05 22:50 First Quarter (42 %)
September 18, 2026 Longmont September 18, 2026: Sunny Sunny 15 °C 28 °C 06:44 19:04 14:59 23:45 First Quarter (53 %)
September 19, 2026 Longmont September 19, 2026: Sunny Sunny 13 °C 30 °C 06:45 19:03 15:44 Does not set today First Quarter (63 %)
September 20, 2026 Longmont September 20, 2026: Overcast Overcast 16 °C 27 °C 06:46 19:01 16:21 00:44 Waxing Moon (73 %)
September 21, 2026 Longmont September 21, 2026: Sunny Sunny 14 °C 31 °C 06:47 18:59 16:51 01:46 Waxing Moon (82 %)
September 22, 2026 Longmont September 22, 2026: Sunny Sunny 10 °C 27 °C 06:48 18:58 17:17 02:49 Waxing Moon (89 %)
September 23, 2026 Longmont September 23, 2026: Sunny Sunny 10 °C 29 °C 06:49 18:56 17:40 03:50 Waxing Moon (95 %)